Vince Taylor, 32, of Winter Springs, Florida, chants "no justice, no peace" before the start of a march down Park Avenue in downtown Sanford, Florida March 26, 2012. George Zimmerman who shot and killed an unarmed Florida teenager in a case that has sparked widespread public outrage told police the victim had punched him, knocked him down and slammed his head into the pavement repeatedly before he fired the fatal gunshot. Zimmerman's account, was published for the first time on Monday in the online edition of the Orlando Sentinel. Police in Sanford, Florida, the Orlando suburb where 17-year-old Trayvon Martin was shot dead on February 26, confirmed that the newspaper report appeared to be based on leaked information from someone inside the police department. REUTERS/Octavian Cantilli (UNITED STATES - Tags: CIVIL UNREST CRIME LAW)